冷弯薄壁卷边槽钢畸变屈曲承载力的计算方法比较

• 作 者: 姚谏 唐婷婷 陈柏新
• 机 构: 浙江树人大学城建学院,浙江大学结构工程研究所,宏丰实业集团有限公司,
• 出 处: 工业建筑
• 发表日期: 2013年06期
• 关键词: 卷边槽钢 冷弯 强度法 承载力计算 计算方法比较 薄壁型钢 受力过程 局部屈曲 极限承载力 板件

冷弯薄壁卷边槽钢在受力过程中除可能出现整体屈曲和局部屈曲外,还可能出现畸变屈曲。发生畸变屈曲会恶化构件的受力性能,从而降低构件的极限承载力。比较研究了5个国家或地区规范针对畸变屈曲的设计计算方法,并对最新的畸变屈曲承载力计算方法研究成果进行归纳,最后就既有的5种考虑畸变屈曲的承载力计算方法与有关试验进行对比分析,结果表明:北美规范采用的直接强度法适用范围广且精度相对较高。

Cold bending thin-walled channel in the process of stress in addition to possible overall buckling and local buckling, the distortion may also appear distorted. Distortion buckling will deteriorate the mechanical properties of the members, so as to reduce the ultimate bearing capacity of the members. In this paper, the design and calculation methods for the regulation of distorted buckling in five countries and regions are comparatively studied, and the latest research results on the calculation method of the distorted buckling capacity are summarized. Finally, five existing methods for calculating the bearing capacity of distorted buckling and the related tests The comparative analysis shows that the direct intensity method adopted by the North American standard has a wide range of application and relatively high accuracy.